Question: A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05)

A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05)

(a) What is the value of the sample mean?

(b) One of these intervals is a 95% CI and the other is a 90% CI. Which one is the 95% CI and why?

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